1. Department of Surgery, Emergency Care, Umeå University, Umeå, Sweden;
2. Department of Emergency Medicine, Karolinska University Hospital, Sweden;
3. Department of Medical Sciences, Molecular Epidemiology and Science for Life Laboratory, Uppsala University, Uppsala, Sweden;
4. Centre for Family Medicine, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Huddinge, Sweden;
5. Department of Neurobiology, Care Sciences and Society, Centre for Family Medicine, Karolinska Institutet, Stockholm, Sweden;
6. Department of Surgery, Emergency Care Umeå University, Umeå, Sweden